real number
Not imaginary, mathematically
A real number is any number that can be placed on a continuous number line, including whole numbers, fractions, and irrational numbers like pi.
The term distinguishes these from imaginary numbers, which involve the square root of negative one.
In everyday contexts, virtually any number you encounter is a real number; the distinction matters mainly in advanced mathematics where complex numbers come into play.
Without pause or gap
- infiniteHaving no bounds
- uncountableNot able to enumerate
- denseClosely packed together
- intervalDuration between two points
bounded · unbounded · completeness · limit · convergence · neighborhood · open · closed
Fractional value separator
- fractionPart divided by whole
- digitSingle numeric character
- place valueDigit worth by position
- roundingAdjusting to simpler values
precision · significant figures · tenths · hundredths · thousandths · notation · fixed-point · floating-point
Part divided by whole
- ratioComparative numerical relation
- integerNumber lacking fractions
- quotientDivision's numerical result
- numeratorNumber being divided
denominator · repeating decimal · proper fraction · improper fraction · reducible · common denominator · reciprocal
Circle's fundamental ratio
- eFifth alphabetic character
- golden ratioPhi, roughly 1.618
- transcendentalBeyond ordinary experience
- nonrepeatingOccurring only once
surd · incommensurable · cube root · nth root
Measurable amount present
- magnitudeSize or scale
- scaleMeasure of relative size
- valueImportance or price
- precisionAccuracy of measurement
accuracy · approximation · error · tolerance · calibration · significant digits · estimation · coordinate
continuous
Without pause or gap
- infiniteHaving no bounds
- uncountableNot able to enumerate
- denseClosely packed together
interval · bounded · unbounded · completeness · limit · convergence · neighborhood · open · closed · continuum hypothesis
decimal point
Fractional value separator
- fractionPart divided by whole
- digitSingle numeric character
- place valueDigit worth by position
rounding · precision · significant figures · tenths · hundredths · thousandths · notation · fixed-point · floating-point · truncation
fraction
Part divided by whole
- ratioComparative numerical relation
- integerNumber lacking fractions
- quotientDivision's numerical result
numerator · denominator · repeating decimal · proper fraction · improper fraction · reducible · common denominator · reciprocal
pi
Circle's fundamental ratio
- eFifth alphabetic character
- golden ratioPhi, roughly 1.618
- transcendentalBeyond ordinary experience
nonrepeating · surd · incommensurable · cube root · nth root
quantity
Measurable amount present
precision · accuracy · approximation · error · tolerance · calibration · significant digits · estimation · coordinate · distance
- numbersone, two, four, three, 0
- math termsnumbers, plus or minus, linear growth, square, operand
- number formatsinteger, decimal, binary, percentage, hexadecimal
- data typesint, integer, float, char, bool
- algebravariables, equations, equation, polynomials, algebraic equations
- number theoryprime numbers, prime, composite, integer, divisor
real numberinteger
Number lacking fractions
natural number · whole number · rational number · irrational number · infinitesimal
real, number, realize, reality, unreal, realized, realization, realizing, realness